$-2x+3\le-9-3x$

$\int\left(e^{\frac{x}{2}}-e^{-\frac{x}{a}}\right)^2dx$

$3-9\cdot6+4$

$\int_0^{\infty}\left(\frac{17x-12}{\left(3x+4\right)\left(x^2+4\right)}\right)dx$

$\frac{d}{dx}\left(\frac{\left(x+1\right)\left(2x+1\right)\left(5x+1\right)}{\sqrt{4x+1}}\right)$

$\sqrt[3]{v}\cdot\sqrt{v}$

$\left(x-1\right)\left(x+2\right)+\left(x-3\right)\left(x+6\right)-2\left(x+1\right)^2$